public class text {


    public static void main(String[] args) {
        Student student1 = new Student("lihua",18,"男",100);
        PetDog dog1 = new PetDog("大黄",2,"金色");
        System.out.println(dog1);

        dog1.name = "卷黑";
        dog1.color = "黑色";
        System.out.println(student1);
        System.out.println(dog1);

        Date date1 = new Date(2025 ,5,25);
        //date1.setDay(2025,5,25);
        System.out.println(date1);
    }

}